UNCTAD source which provides annual pricing data from 1960 to the present for various commodities often specific to a place. Includes "Commodity price long term trends" and "Commodity price instability".

The World Bank collection of monthly commodities prices & indices from 1960+, updated on the 3rd working day of each month, as presented in the Commodity Price Data (a.k.a. Pink Sheet), published continuously for more than half a century.

Up to date as well as historical (though generally not before 1989) international data on commodities. Frequency varies but is typically daily for financial information and in some cases intradaily. Intradaily data is typically kept from 30 to 90 days only. Downloading is extremely limited.